Don't keep your mouth ___ if you want to improve your spoken English.

Don’t expect too much of him. After all , he is a child of ______ intelligence.

A good story does not necessarily have to have a happy ending, but the reader must not be left        .

 The boy is ______ computer games and stays in the Internet cafe all day and night.

I’m sorry，the sales manager is not________.He is on the telephone at the moment.